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Fault and fracture development density and uniformity and combined style evaluation method

A fracture development and evaluation method technology, applied in the field of oil and gas field exploration and development, can solve the problems of heavy manual work, inaccurate fault parameters, time-consuming and labor-intensive problems, and achieve the effect of low prediction cost, high practical value and strong operability

Inactive Publication Date: 2017-02-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0003] The present invention aims at solving the above-mentioned problems, and provides a method for evaluating fault and fracture development density, uniformity and combination pattern, which solves the problem of large workload, time-consuming and labor-intensive calculation of fractures, Fault parameter inaccurate problem

Method used

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  • Fault and fracture development density and uniformity and combined style evaluation method
  • Fault and fracture development density and uniformity and combined style evaluation method

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specific Embodiment approach

[0051] The Jinhu Sag is structurally located in the west of the Dongtai Depression in the Subei Basin, and is a faulted basin developed in the Late Cretaceous. It starts from Jianhu Uplift in the north, Tianchang Uplift in the south, Zhangbaling Uplift in the west, and Lingtangqiao and Liubao low uplifts in the east. It crosses Jiangsu and Anhui provinces geographically, covering an area of ​​about 5000km. 2 , Is the largest sedimentary depression in the Subei Basin ( Image 6 ). Under the control of the northeast-trending Jianhu uplift and Tianchang uplift, and restricted by the north-east-trending Liubao low uplift, the Lingtangqiao low uplift and the boundary Yangcun fault, the Funing Formation formed during the depositional period of the south fault and north super, It is steep in the south and gentle in the north, and it is distributed in the northeast direction.

[0052] The structure of the Jinhu Sag is a single fault-fault super-type, that is, a simple half graben. The ov...

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Abstract

The invention relates to the field of oil and gas field exploration and development, and particularly relates to a fault and fracture development density and uniformity and combined style evaluation method. The appropriate grid cell length is selected and a fault and fracture development density and uniformity and combined style evaluation model is designed on the basis of point filling through datamation of faults / fractures so that fault and fracture development density and uniformity and combined style quantitative calculation can be realized. The method has high practical value in multiple aspects of statistical calculation of fault / fracture parameters and processing of field geological sketches, and has low prediction cost and high operability so that labor cost can be greatly reduced.

Description

Technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method for evaluating faults and fractures development density, uniformity and combination styles. Background technique [0002] In field or indoor geological work, when faults / fractures develop, the accurate and quantitative characterization of their development density, uniformity and combination pattern is a major difficulty in geological work. Traditional fault / fracture density and combined style evaluation are often performed by simple meter measurement and statistical calculation. This process has a large workload and low accuracy, which is greatly restricted in actual operation; and the density of faults / fractures has a scale effect. Using calculation units with different side lengths, the surface density of cracks in a certain area may be very different. The patent of the present invention selects the appropriate grid cell side length based o...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306
Inventor 刘敬寿丁文龙杨海盟谷阳肖子亢
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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